<template>
  <div class="type-nav">
    <div class="container" @mouseleave="showList">
      <h2 class="all" @mouseenter="showList">全部商品分类</h2>
      <nav class="nav">
        <a href="###">服装城</a>
        <a href="###">美妆馆</a>
        <a href="###">尚品汇超市</a>
        <a href="###">全球购</a>
        <a href="###">闪购</a>
        <a href="###">团购</a>
        <a href="###">有趣</a>
        <a href="###">秒杀</a>
      </nav>
      <transition name="sort">
        <div class="sort" @click="toSearch" v-show="showFirstList">
          <div class="all-sort-list2">
            <div
              class="item"
              v-for="category1 in categoryList"
              :key="category1.categoryId"
            >
              <h3>
                <a
                  href="javascript:;"
                  :data-name="category1.categoryName"
                  :data-id1="category1.categoryId"
                  >{{ category1.categoryName }}</a
                >
              </h3>
              <div class="item-list clearfix">
                <div class="subitem">
                  <dl
                    class="fore"
                    v-for="category2 in category1.categoryChild"
                    :key="category2.categoryId"
                  >
                    <dt>
                      <a
                        href="javascript:;"
                        :data-name="category2.categoryName"
                        :data-id2="category2.categoryId"
                        >{{ category2.categoryName }}</a
                      >
                    </dt>
                    <dd>
                      <em
                        v-for="category3 in category2.categoryChild"
                        :key="category3.categoryId"
                      >
                        <a
                          href="javascript:;"
                          :data-name="category3.categoryName"
                          :data-id3="category3.categoryId"
                          >{{ category3.categoryName }}</a
                        >
                      </em>
                    </dd>
                  </dl>
                </div>
              </div>
            </div>
          </div>
        </div>
      </transition>
    </div>
  </div>
</template>

<script>
import { mapState } from "vuex";
import "@/common/less/transition.less";
export default {
  name: "typeNav",
  components: {},
  data() {
    return {
      showFirstList: this.$route.meta.showFirstList,
    };
  },
  computed: {
    ...mapState({
      categoryList: (state) => state.home.categoryList,
      keyword: (state) => state.keyword,
    }),
  },
  methods: {
    showList(ev) {
      const switchType = {
        mouseenter: true,
        mouseleave: false,
      };
      if (this.$route.name !== "home") this.showFirstList = switchType[ev.type];
    },
    //点击三级列表跳转到search页面，可以给每个a标签添加点击事件，但是事件注册太多，利用事件委托来减少事件注册
    toSearch(ev) {
      const {
        id1: category1Id,
        id2: category2Id,
        id3: category3Id,
        name: categoryName,
      } = ev.target.dataset;
      let options = {
        name: "search",
        query: {},
        params: { keyword: "" },
        hash: `#${Date.now()}`,
      };
      //判断search按钮是否有传递参数
      let params = this.$route.params;
      console.log(this.keyword);

      if (Object.keys(params).length !== 0) options.params = params;
      //判断三级列表是否传递数据
      category1Id ? (options.query.category1Id = category1Id) : "";
      category2Id ? (options.query.category2Id = category2Id) : "";
      category3Id ? (options.query.category3Id = category3Id) : "";
      categoryName ? (options.query.categoryName = categoryName) : "";

      //解决在search组件中点击三级分类，要隐藏三级分类
      if (this.$route.name === "search") {
        this.showFirstList = false;
      }
      let keyword = params.keyword;
      // if (keyword && keyword !== this.keyword) {
      //   options.params.keyword = this.keyword;
      // }

      options.params.keyword = this.keyword;
      console.log(options.params.keyword);
      this.$router.push(options);
    },
  },
};
</script>
<style lang='less' scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;

  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;

            a {
              color: #333;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 54px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 415px;
                  padding: 3px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &:hover {
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
</style>